Mick
I knew they called them 4.9L but I just used 5.0L to distinguish from the Nissan hand grenade versions.
Did the 5.6 litre versions have a different engine number prefix to a regular HDT VL 304 engine?
If they used 327 pistons they are probably machined to keep them under the deck. Unless the small amount less stroke to make 346ci (I assume this is at 4" bore?) keeps the 327 piston at the right deck height? This would explain why the rods just clear.
Is it possibly a cut and shut LJ Chev crank with the big ends ground down to Holden size? It'd probably be obvious if this is the case though as it'd have a Cleveland like thrust cap on one of the inner bearing journals.
Edit, read the link above. Using 30 thou over pistons, stroke to get 346ci would be 3.39" so that puts the pistons 45 thou further down the bore so this probably explains the stroke (so special pistons weren't required).
Also the link shows the engine prefix as VJ, so just a standard VL block.
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